package com.xtaller.sdboot.utils.helper;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @author : Taller
 * @date : 2020/1/13 10:27
 * @Description : 提供常用的日期操作的工具类
 */
public class DateHelper extends DateUtils {
    /***
     * 日期时间格式
     */
    public static final String FORMAT_DATE_y2M = "yyMM";
    public static final String FORMAT_DATE_y2Md = "yyMMdd";
    public static final String FORMAT_DATE_y4 = "yyyy";
    public static final String FORMAT_DATE_y4Md = "yyyyMMdd";
    public static final String FORMAT_DATE_Y4MD = "yyyy-MM-dd";
    public static final String FORMAT_TIMESTAMP = "yyMMddhhmmss";
    public static final String FORMAT_TIME_HHmm = "HH:mm";
    public static final String FORMAT_TIME_HHmmss = "HH:mm:ss";
    public static final String FORMAT_DATETIME_Y4MDHM = "yyyy-MM-dd HH:mm";
    public static final String FORMAT_DATETIME_Y4MDHMS = "yyyy-MM-dd HH:mm:ss";
    /***
     * 星期
     */
    protected static final String[] WEEK = new String[]{"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};

    /***
     * 当前的日期时间
     * @return format指定格式的日期时间
     */
    public static String now(String format){
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(cal.getTime());
    }

    /**
     * 当前日期时间串
     * @return yyMMddhhmmss
     */
    public static String toTimestamp(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_TIMESTAMP);
        return sdf.format(date.getTime());
    }

    /**
     * 获取月份
     * @return
     */
    public static String getMonth(){
        return now(FORMAT_DATE_y2M);
    }

    /***
     * 获取今天的日期
     * @return yyyyMMdd
     */
    public static String today(){
        return now(FORMAT_DATE_y4Md);
    }

    /***
     * 转换字符串为日期date
     * @param datetime
     * @param fmt
     * @return
     */
    public static Date convert2FormatDate(String datetime, String fmt){
        if (StringUtils.isBlank(datetime)){
            return null;
        }
        SimpleDateFormat format =  new SimpleDateFormat(fmt);
        try {
            Date date = format.parse(datetime);
            return date;
        }
        catch (ParseException e) {
        }
        return null;
    }

    /***
     * 转换date为格式化字符串
     * @param date
     * @param fmt
     * @return
     */
    public static String convert2FormatString(Date date, String fmt) {
        if (date == null) {
            return null;
        } else {
            SimpleDateFormat format = new SimpleDateFormat(fmt);
            return format.format(date);
        }
    }

    /**
     * 获取格式化的日期
     * @param date 基准日期
     * @param daysOffset 偏移量
     * @return yyyy-MM-dd
     */
    public static String getDate(Date date, int... daysOffset){
        if(date == null){
            date = new Date();
        }
        if(daysOffset != null && daysOffset.length > 0){
            date = addDays(date, daysOffset[0]);
        }
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_DATE_Y4MD);
        return sdf.format(date);
    }

    /***
     * 获取格式化的日期时间
     * @param date
     * @return yyyy-MM-dd HH:mm
     */
    public static String getDateTime(Date date, int... daysOffset){
        if(date == null){
            date = new Date();
        }
        if(daysOffset != null && daysOffset.length > 0){
            date = addDays(date, daysOffset[0]);
        }
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_DATETIME_Y4MDHM);
        return sdf.format(date);
    }

    /**
     * 是否是工作时间段，用于后台程序等
     * @return
     */
    public static boolean isWorkingTime(){
        Calendar cal = Calendar.getInstance();
        int hour = cal.get(Calendar.HOUR_OF_DAY);
        return (hour >= 8 && hour < 20);
    }

    /***
     * 获取上午/下午
     * @return
     */
    public static String getAmPm() {
        Calendar c = Calendar.getInstance();
        int hours = c.get(Calendar.HOUR_OF_DAY);
        if (hours <= 9){
            return "早上";
        }
        else if (9 < hours && hours <= 12){
            return "上午";
        }
        else if (12 < hours && hours <= 13){
            return "中午";
        }
        else if (13 < hours && hours <= 18){
            return "下午";
        }
        else{
            return "晚上";
        }
    }

    /**
     * 得到当前的年月YYMM，用于生成文件夹名称
     * @return
     */
    public static String getYearMonth(){
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_DATE_y2M);
        return sdf.format(cal.getTime());
    }

    /**
     * 得到当前的年月YYMM，用于生成文件夹
     * @return
     */
    public static String getYearMonthDay(){
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_DATE_y2Md);
        return sdf.format(cal.getTime());
    }

    /**
     * 得到当前的年月YYMM，用于生成文件夹
     * @return
     */
    public static int getDay(){
        Calendar cal = Calendar.getInstance();
        return cal.get(Calendar.DAY_OF_MONTH);
    }

    /***
     * 获取日期对应的星期
     * @param date
     * @return
     */
    public static String getWeek(Date date){
        return WEEK[Calendar.getInstance().get(Calendar.DAY_OF_WEEK)];
    }

    /**
     * 毫秒数转date
     * @param timeMillis
     * @return
     */
    public static Date timeMillis2Date(Long timeMillis){
        return new Date(timeMillis);
    }

    /**
     * 字符串时间戳转日期
     * @param value
     * @return
     * @throws ParseException
     */
    public static Date datetimeString2Date(String value){
        return convert2DateTime(value, FORMAT_DATETIME_Y4MDHMS);
    }

    /**
     * 字符串时间戳转日期
     * @return
     * @throws ParseException
     */
    public static Date convert2Date(String date){
        return convert2FormatDate(date, FORMAT_DATE_Y4MD);
    }

    /**
     * 字符串时间戳转日期
     * @param dateTime
     * @return
     * @throws ParseException
     */
    public static Date convert2DateTime(String dateTime, String... dateFormat){
        String f = FORMAT_DATETIME_Y4MDHM;
        if(dateFormat != null && dateFormat.length > 0){
            f = dateFormat[0];
        }
        return convert2FormatDate(dateTime, f);
    }

    /***
     * 模糊转换日期
     * @param dateString
     * @return
     */
    public static Date fuzzyConvert(String dateString){
        if(StringUtils.isEmpty(dateString)){
            return null;
        }
        // 清洗
        if(dateString.contains("-")){
        }
        else if(dateString.contains("月")){
            dateString = dateString.replaceAll("年", "-").replaceAll("月", "-").replaceAll("日", "").replaceAll("号", "");
        }
        else{
            dateString = dateString.replaceAll("\\/", "-").replaceAll("\\.", "-");
        }
        String[] parts = dateString.split(" ");
        String[] ymd = parts[0].split("-");
        if(ymd.length >= 3){
            if(ymd[0].length() == 2){
                ymd[0] = String.valueOf(Calendar.getInstance().get(Calendar.YEAR)).substring(0, 2) + ymd[0];
            }
            if(ymd[1].length() == 1){
                ymd[1] = "0" + ymd[1];
            }
            if(ymd[2].length() == 1){
                ymd[2] = "0" + ymd[2];
            }
        }
        parts[0] = StrHelper.join(ymd, "-");
        if(parts.length == 1){
            return DateHelper.convert2FormatDate(parts[0], DateHelper.FORMAT_DATE_Y4MD);
        }
        // 18:20:30:103
        String[] hmsArray = new String[3];
        String[] hms = parts[1].split(":");
        if(hms[0].length() == 1){
            hms[0] = "0" + hms[0];
        }
        hmsArray[0] = hms[0];
        if(hms.length >= 2){
            if(hms[1].length() == 1){
                hms[1] = "0" + hms[1];
            }
            hmsArray[1] = hms[1];
        }
        else{
            hmsArray[1] = "00";
        }
        if(hms.length >= 3){
            if(hms[2].length() == 1){
                hms[2] = "0" + hms[2];
            }
            hmsArray[2] = hms[2];
        }
        else{
            hmsArray[2] = "00";
        }
        parts[1] = StrHelper.join(hmsArray, ":");
        return DateHelper.convert2FormatDate(StrHelper.join(parts, " "), DateHelper.FORMAT_DATETIME_Y4MDHMS);
    }
}
